On 2018-06-07 20:52, Leonard Crestez wrote:
> Interrupts are ignored if no event bit is set in the status status
> register and this breaks the buffer interface. No data is shown when
> running "iio_generic_buffer -n mma8451 -a" and interrupt counts go
> crazy.
>
> Fix by not returning IRQ_NONE if DRDY is set.
>
> Fixes: 605f72de137a ("iio: accel: mma8452: improvements to handle
> multiple events")
>
> Signed-off-by: Leonard Crestez <leonard.crestez@xxxxxxx>
At least this does no harm to events. So if this solves your problem:
Acked-by: Martin Kepplinger <martink@xxxxxxxxx>
thanks,
martin
>
> ---
> drivers/iio/accel/mma8452.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Perhaps this whole early-exit check could be dropped? It is not clear
> how it helps.
>
> If for some models we want to ignore unsupported events then maybe this
> should be checked for each individual bit. Instead of
>
> if (src & MMA8452_INT_FF_MT) {
>
> Check for:
>
> if ((src & MMA8452_INT_FF_MT) && (data->chip_info->enabled_events & MMA8452_INT_FF_MT))
>
> diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
> index 7a2da7f9d4dc..5485b35fe553 100644
> --- a/drivers/iio/accel/mma8452.c
> +++ b/drivers/iio/accel/mma8452.c
> @@ -1032,11 +1032,11 @@ static irqreturn_t mma8452_interrupt(int irq, void *p)
>
> src = i2c_smbus_read_byte_data(data->client, MMA8452_INT_SRC);
> if (src < 0)
> return IRQ_NONE;
>
> - if (!(src & data->chip_info->enabled_events))
> + if (!(src & (data->chip_info->enabled_events | MMA8452_INT_DRDY)))
> return IRQ_NONE;
>
> if (src & MMA8452_INT_DRDY) {
> iio_trigger_poll_chained(indio_dev->trig);
> ret = IRQ_HANDLED;
>
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